The IKS Rotarran
was a B'rel class bird
of prey serving in the Klingon Defense Force
in the 24th century.
After being freed from the Hekiss POW Camp Colonel Nekrot went aboard the ship to secure aid from the Ninth Fleet's commander to capture Geltrik Nor. ("Narkonna")
When Martok assumed Chancellorship of the Klingon Empire he kept the Rotarran as his flagship and used the Negh'var to run fasle operations against the Dominion.